When you put an item on the altar of Krong, the outcome seems pretty random: either it gets cursed or some benefits (sometimes these are not very relevant - as in an armor item getting pluses or minuses to mana regeneration when playing a warrior).

Is this process random, or is there anything you can do to influence the outcome? I've had a couple of theories:

If you've bought the item from a shop, it's more likely to be cursed

If you've crafted the item yourself, it's more likely to get a good effect

If Krong has blessed an item before, he won't do so again

It's completely random, the game chooses one 'stat' to modify and does so in a random direction (most likely +/- 1)

Only theory #4 seems to be holding up so far... I've never seen a curse and a blessing at the same time.